@Makyen A normalized version,
{{'19038243600', '9038243600'}}
, of that pattern is already on the number blacklist. You can use
!!/bisect-number 903 824 3600
to determine which entries on the number lists match that pattern, which would tell you: Matched by
903 824 3600
on
line 958 of blacklisted_numbers.txt: 903 824 3600 found verbatim